Remove wxVector unit test

Testing this class doesn't make much sense any more as it's just a
typedef for std::vector and we can presumably rely on the standard class
working as expected.

build/cmake/tests/base/CMakeLists.txt

@@ -89,7 +89,6 @@ set(TEST_SRC
     uris/ftp.cpp
     uris/uris.cpp
     uris/url.cpp
-    vectors/vectors.cpp
     weakref/evtconnection.cpp
     weakref/weakref.cpp
     xlocale/xlocale.cpp